Evolution of Galaxy Luminosity in the CDM Model

  • Mirta Mosconi
  • Patricia Tissera
  • Diego García Lambas
Part of the International Astronomical Union/Union Astronomique Internationale book series (IAUS, volume 168)

Abstract

We analyze the evolution of the luminosity function of galaxies using the CDM model in numerical simulations. There is an observational excess in the number counts of galaxies per square degree in the blur band Nb (i.e. APM, Maddox et. al. 1990). Several authors have tried to reproduce it trying to fit the observations. Our model assumes an instantaneous star formation rate (SFR) proportional to a power of the local density. A ‘single star burst’ is produced each time step and we follow the evolution of the luminosity and colour of each ‘stellar group’. The galaxies are identified with a density criterium. We compute U,V,B,K colours and Nb and our results agree quite well with observations.

Keywords

Dark Matter Density Criterium Number Count Luminosity Function Star Formation Rate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

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Copyright information

© International Astronomical Union 1996

Authors and Affiliations

  • Mirta Mosconi
    • 1
  • Patricia Tissera
    • 1
    • 2
  • Diego García Lambas
    • 1
    • 2
  1. 1.Observatorio Astronómico de CórdobaArgentina
  2. 2.Consejo de Investigaciones Científicas y Técnicas (CONICET)Argentina

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